Static front page not working

Hello,

my static frontpage is not working (when in reading set static front a different one)

in twentyeleven it is working fine. So it is a mistake in my theme. But I have no idea. Thats why I ask you guys. This is my code:

<div id="content">

    <?php if(have_posts()) : ?>
     <?php $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
	   query_posts("paged=$paged"); ?>
        <?php while(have_posts()) : the_post(); ?>

            <div id="post-<?php the_ID(); ?>" <?php post_class('post-single'); ?>>

thanks.